Results 171 to 180 of about 23,651 (213)

Generalized Temporal Code Division Multiple Access (CDMA) For Optical Communications

SPIE Proceedings, 1990
The CSI has developed analytical techniques for constructing pseudo orthogonal words suitable for temporal CDMA. The performance of these sets of words have been studied with respect to bit-error rate and with respect to other coding methods. The CSI methodology and algorithms permit generalized solutions for any combination of users (words), weights ...
A. J. Mendez, S. Kuroda, R. Gagliardi, E. Garmire   +3 more
openaire   +1 more source

Code division multiple access (CDMA) enhancement of wavelength division multiplexing (WDM) systems

Proceedings IEEE International Conference on Communications ICC '95, 2002
Wavelength division multiplexing (WDM) is a mainstream technology for optical communications ranging from long haul applications to interconnections between and within high speed digital systems. WDM is, however, constrained (1) in density by the crosstalk associated with channel spacing and (2) by total number of channels which can be uniformly ...
A.J. Mendez, R.M. Gagliardi
openaire   +1 more source

CDMA-IC: a novel code division multiple access scheme based on interference cancellation

[1992 Proceedings] The Third IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2003
Third generation cellular systems will need to increase capacity significantly from previous generations. A system based on code division multiple access may be of interest provided limitations often present in current proposals are overcome. Here, an alternative is discussed which offers many promising features. The predicted capacity is very high and
Paul Dent, Björn Gudmundson, Magnus Ewerbring   +2 more
openaire   +1 more source

Multilevel priority scheme for fiber-optic code division multiple access (CDMA) packet networks

IEEE INFOCOM '93 The Conference on Computer Communications, Proceedings, 2002
A multilevel priority scheme for fiber-optic CDMA is proposed. Users are divided into groups with different transmission power levels. Since the inherent properties and signal processing of the conventional communication channels are different from those of the fiber-optic channels, new code sequences must be constructed for fiber-optic applications ...
Li, Victor OK, Hsu, CherngShung
openaire   +2 more sources

Error Performance of Chaotic Digital Code-Divison Multiple Access (CDMA) Systems

International Journal of Bifurcation and Chaos, 1998
Chaotic digital code-division multiple access ((CD)2MA) systems are new types of communication systems using chaotic carriers. (CD)2MA had found applications in both wireless and other communication systems. In this paper we study the error performance of chaotic digical code-division multiple access ((CD)2MA) systems used in both wireless environment
Yang, Tao, Chua, Leon O.
openaire   +2 more sources

Applications of optical code division multiple access (CDMA) to wireless communication

Proceedings of SPIE, 1995
The theoretical foundations for code division multiple access (CDMA) are similar for microwave and optical implementations, and the advantages of this form of multiple access communications are similar, also. The advantages include the ability to support bursty, asynchronous, concurrent communications and to tolerate multipath interference.
openaire   +1 more source

Code Division Multiple Access (CDMA)

2018
This chapter presents a brief overview of spread spectrum technique and shows how it relates to CDMA technology. Orthogonal codes and their properties are presented and show how orthogonal codes are generated and used to design CDMA radio. It is shown that CDMA capacity directly relates to code length.
openaire   +1 more source

Tracking acoustic transmitters by code division multiple access (CDMA)-based telemetry

Hydrobiologia, 2002
This paper describes a new acoustic telemetry system based on the principles of code division multiple access (CDMA) whereby signal coding enables the simultaneous sub-meter monitoring of potentially hundreds of animals at high sampling rate (e.g. 5 s) and on a single frequency channel.
G. Niezgoda, M. Benfield, M. Sisak, P. Anson   +3 more
openaire   +1 more source

Analyses and experiments of optical code division multiple access (CDMA) with code length near unity

LEOS '95. IEEE Lasers and Electro-Optics Society 1995 Annual Meeting. 8th Annual Meeting. Conference Proceedings, 2002
Optical code division multiple access (CDMA) has many attractive system features. In this paper we describe the analytical approach to encoding/decoding data with chips approaching the bit size (representing 100% bandwidth efficiency), and we describe the experimental performance in terms of bit error rate (BER) measurements.
A.J. Mendez, J.-M. Morookian, R.M. Gagliardi   +2 more
openaire   +1 more source

A transmission convergence sublayer for wireless ATM with code division multiple access (CDMA)

Proceedings of MILCOM '96 IEEE Military Communications Conference, 2002
Asynchronous transfer mode (ATM) is rapidly emerging as a key transport mechanism of future multimedia networks, and wireless networks are being widely deployed to provide personal communication services. Thus future ATM networks are expected to comprise wireline as well as wireless subnetworks and the interoperability of wireless and wireline ATM ...
F. Vakil, M. Barton
openaire   +1 more source